Prove the identity Cos²x -

  1. Where do I start to prove this identity:sinx/cosx= 1-cos2x/sin2x please help!! Hint: Fractions are evil. Get rid of them. Well,
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    2. maria asked by maria
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  2. Prove Identity: (1-cos2x/ tan x) = sin2x
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    2. Yadira asked by Yadira
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  3. How do you prove this identity?cos2x*tan(π\4-x)= 1-sin2x
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    2. Branco asked by Branco
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  4. Trig identityProve: cos2x tan(pie/4 - x) ------- = 1 + sin2x
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    2. avm asked by avm
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  5. Prove the identityCos²x - sin²x = 2cos²x - 1
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  6. Prove the identityCos⁴x + sin²x = sin⁴x + cos²x
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  7. Required to Prove the following trig identity:(cos2x)^2 + (sin2x)^2 = 1
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    2. Halle asked by Halle
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  8. use power reducing identities to prove the identitysin^4x=1/8(3-4cos2x+cos4x) cos^3x=(1/2cosx) (1+cos2x) thanks :)
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    2. skye asked by skye
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  9. Solve identity,(1-sin2x)/cos2x = cos2x/(1+sin2x) I tried starting from the right side, RS: =(cos²x-sin²x)/(1+2sinxcosx)
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    2. sh asked by sh
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  10. Use the Pythagorean identity to show that the double angle formula for cosine can be written asa) cos2x = 1 - 2sin^2x b) cos2x =
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    2. Anonymous asked by Anonymous
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